Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
  • C07H17/00—Compounds containing heterocyclic radicals directly attached to hetero atoms of saccharide radicals
  • C07H17/04—Heterocyclic radicals containing only oxygen as ring hetero atoms
  • C07H17/08—Hetero rings containing eight or more ring members, e.g. erythromycins

Definitions

• This invention relates to tylosin derivatives useful as antibiotics.
• Tylosin itself is a useful macrolide antibiotic but the tylosin derivatives provided by the present invention having the following general formula I, have greater antibiotic activity: wherein R 1 represents a hydroxyl group; a halogen atom; [wherein R 5 represents a hydrogen atom or a lower alkyl or hydroxyalkyl group and R 6 represents a hydrogen atom, a lower alkyl or hydroxyalkyl group, an aryl group, an aralkyl group, a C3to C 10 cycloalkyl group, -CO(O) m -R 7 (wherein m represents O or 1 and R 7 represents a lower alkyl, aryl, aralkyl, furanyl or pyridyl group), or -CH 2 -R 13 (wherein R represents a mono-, di-, or triflucromethyl group)] ; - in which n represents an integer of 2-15 and which may be substituted by an oxo, hydroxyl, lower alky
• any lower alkyl group is a straight or branched alkyl group having 1-6 carbon atoms, e.g. methyl, ethyl, isopropyl, butyl, tert-butyl, pentyl, or hexyl.
• the aryl group are phenyl and naphthyl;
• examples of the aralkyl group are those with.an alkyl substituent of 1 to 4 carbon atoms, e.g. benzyl, phenethyl and phenylpropyl; and examples of the lower (C 1 to C 6 ) alkanoyl group are acetyl, propionyl and butyryl.
• R is or substituted or unsubstituted as defined above
• R 2 is a hydrogen atom
• R 3 is -CH 2 CHO
• R 4 is a hydrogen atom or a hydroxyl group
• lines and ---- are each double bonds.
• a compound I-a wherein R 1-a represents (wherein R 6 , is a hydrogen atom or a C 1 to C 6 alkyl or hydroxyalkyl group, an aryl, group, an aralkyl group, or a C 3 to C 10 cycloalkyl group) or a substituted or unsubstituted - group as defined above can be prepared by reacting a compound II wherein X represents a halogen atom, and R 3 ' represents a methyl group or a -CH 2 - protected aldehyde group, with a compound III and then, when R 3 ' of the product is a -CH 2 -protected aldehyde group, (i) releasing the aldehyde-protective group or (ii) (a) reacting the product with a carboxylic acid IV or a reactive derivative thereof, (b) treating the reaction product with an alcohol, and (c) releasing the aldehyde-protective group.
• the foregoing protected aldehyde group is in the form of an acetal or thioacetal, e.g. dimethylacetal, diethylacetal, diethylthioacetal, ethyleneacetal, ethylenethioacetal, propy- leneacetal, and such acetals having a substituent such as lower alkyl.
• an acid anhydride or acid halide can for example be used.
• the compounds II and III are preferably reacted in an organic solvent such as tetrahydrofuran, acetonitrile, dioxane, dimethylformamide, or dimethyl sulfoxide at room temperature-or under heating.
• organic solvent such as tetrahydrofuran, acetonitrile, dioxane, dimethylformamide, or dimethyl sulfoxide at room temperature-or under heating.
• An aldehyde-protective group can usually be released by treating the product with inorganic acid such as hydrochloric acid or sulfuric acid, or organic acid such as trifluoroacetic acid or trichloroacetic acid in the presence of water; such procedure can also be employed for release of the aldehyde-protective groups in Methods 2, 3 and 6 to 13 below.
• inorganic acid such as hydrochloric acid or sulfuric acid
• organic acid such as trifluoroacetic acid or trichloroacetic acid in the presence of water
• Reaction of (a) a reaction product of compound II wherein R 3 ' is ⁇ a -CH 2 -protected aldehyde group and a compound III with (b) a compound IV or a reactive derivative thereof can be performed in a basic solvent such as pyridine, triethylamine, or collidine, optionally along with an organic solvent such as acetone, dimethyl sulfoxide, or dimethylformamide at room temperature or under heating.
• a basic solvent such as pyridine, triethylamine, or collidine
• compound IV When compound IV is used as the free acid, it is preferred to use a condensing agent such as N,N'-dicyclohexyl-carbodiimide or N,N'-carbonylimidazole; by this reaction, the hydroxyl group not only at the 3-position but also at the 2'-position (and R 4 when . this is also a hydroxyl group at the 4'-position) are simultaneously converted to lower alkanoyloxy groups, and hence the reaction product is allowed to stand at room temperature or heated in an alcohol such as methanol or ethanol, to hydrolyze the alkanoyloxy group at the 2'position (or the 2'- and 4'-positions).
• a condensing agent such as N,N'-dicyclohexyl-carbodiimide or N,N'-carbonylimidazole
• R 1-a in the compound III is a group having an oxo group, such as a piperidone, it is preferred for the oxo group to be in protected form, e.g. as a dimethylketal.
• a compound I-b wherein R 5 ' is a lower alkyl group can be prepared by (a) reacting a compound II wherein R 3 ' is a protected aldehyde group with a compound IV or a reactive derivative thereof, '(b) reacting the product with a compound V to provide a compound VI wherein R 4 ' is a hydrogen atom or a lower (C 1 to C 6 ) alkanoyloxy group, (c) reacting the resulting product with a carboxylic acid VII or a reactive derivative thereof, (d) treating the product with an acohol, and (e) releasing the aldehyde-protective group.
• an acid anhydride or acid halide is usually used as a reactive derivative of the carboxylic acid VII.
• R 3 ' is a protected aldehyde group
• the compound II is preferably reacted with the compound IV or its reactive derivative in a nonprotonic solvent such as acetonitrile, acetone, dimethyl sulfoxide or dioxane at room temperature or under cooling so that the hydroxyl group at the 3-position is not converted into a lower alkanoyl group.
• the reaction product and the compound V can then be reacted in the foregoing solvent under heating, preferably under reflux.
• the compound IV and compound VII or its reactive derivative can be reacted in the foregoing solvent at room temperature.
• a condensing agent such as N,N'-dicyclohexylcarbodiimide or N,N'-carbonylimidazole.
• the product can be treated with an alcohol by allowing it to stand at room temperature or heating it in an alcohol such as methanol, or ethanol.
• a compound I-c can be prepared by (a) reacting a compound VIII with a compound IX wherein X and X' represent the same or different halogens to provide a compound x, (b) reacting the compound X with a compound XI or XI I wherein R 12 represents an alkali metal atom, (c) treating the product with an alcohol, and (d) releasing the aldehyde-protective group.
• alkali metal atom sodium and potassium.
• reaction of the compounds VIII and IX can be performed in a basic solvent such as pyridine or triethylamine under cooling.
• reaction of the compound X with compound XI or XII can be performed in an organic solvent such as acetonitrile, tetrahydrofuran, dioxane, dimethylformamide or dimethyl sulfoxide at room temperature.
• organic solvent such as acetonitrile, tetrahydrofuran, dioxane, dimethylformamide or dimethyl sulfoxide at room temperature.
• the product can be treated with an alcohol as in Method 2.
• 19-Decarbonyl-4'-deoxymycaminosyl tylonolide (I-d) can be prepared by reacting 4'-deoxymycaminosyl tylonolide with chlorotris (triphenylphosphine) rhodium: [(C 6 H 5 ) 3 p] 3 RhCl.
• the reaction can be performed in an organic solvent such as benzene, toluene, or yxlene, at room temperature or under heating, preferably in a nitrogen stream.
• organic solvent such as benzene, toluene, or yxlene
• a compound I-e can be prepared by halogenating a compound XIII
• the halogenation can be performed using a halogenating agent such as chlorine, bromine, iodine, carbon tetrachloride, carbon tetrabromide, or carbon tetraiodide at room temperature or under cooling, preferably ice-cooling. It is preferred to accelerate the reaction by adding triphenyl phosphine, and if necessary a base such as pyridine, to the reaction system. Some of these additives may act as solvent but, if necessary, a solvent such as acetonitrole, tetrahydrofuran, or dioxane may be used.
• a halogenating agent such as chlorine, bromine, iodine, carbon tetrachloride, carbon tetrabromide, or carbon tetraiodide at room temperature or under cooling, preferably ice-cooling. It is preferred to accelerate the reaction by adding triphenyl phosphine, and if necessary a base such as pyridine, to the reaction
• a compound I-f can be prepared by (a) catalytically reducing a compound XIV ; (b) halogenating the product, (c) reacting the halogenation product with a compound III, and (d) releasing the aldehyde-protective group.
• the catalytic reduction can be performed by introducing hydrogen gas in an organic solvent such as methanol, ethanol, diethyl ether, tetrahydrofuran, or ethyl acetate, in the presence of a catalyst such as palladium, platinum, or platinum black.
• an organic solvent such as methanol, ethanol, diethyl ether, tetrahydrofuran, or ethyl acetate
• the halogenation of the foregoing product can be performed in an organic solvent such as pyridine, acetonitrile, tetrahydrofuran, or dioxane at room temperature or under cooling, preferably under ice-cooling in a nitrogen stream.
• organic solvent such as pyridine, acetonitrile, tetrahydrofuran, or dioxane
• the halogenating agents used in Method 5 can be used, and the halogenation reaction can be accelerated by adding triphenyl phosphine and if necessary a base such as pyridine to the reaction system.
• Th e.halogenated compound and the compound III can be reacted in an organic solvent such as tetrahydrofuran, acetonitrile, dioxane, dimethylformamide, or dimethyl sulfoxide at room temperature or under heating.
• organic solvent such as tetrahydrofuran, acetonitrile, dioxane, dimethylformamide, or dimethyl sulfoxide at room temperature or under heating.
• a compound I-g can be prepared by (a) reducing the reaction product of a compound II wherein R 3 ' is a -CH 2 -protected .aldehyde group and a compound III using a hydrogenated metal complex compound, and (b) releasing the aldehyde-protective group.
• Suitable hydrogentated metal complex compounds are sodium borohydride or aluminum lithium hydride, and the reduction can be performed in an organic solvent such as methanol, ethanol, tetrahydrofuran, benzene, or toluene under cooling.
• a compound I-h wherein R 1-b represents a hydroxyl group or an R 1-a group can be prepared by (a) treating a compound XV with a peracaid, (b) treating the product with triphenylphosphine, and (c) releasing the aldehyde-protective group.
• Suitable peracids are performic,peracetic and perbenzoic acids.
• the treatment with peracid can be performed in an organic solvent such as chloroform, ethyl acetate, methylene chloride, acetonitrile, dioxane, dimethylformamide or dimethyl sulfoxide.
• the treatment with triphenylphosphine can be performed in the foregoing solvent under heating, preferably under reflux in argon stream.
• a compound I-i can be prepared by (a) reacting a compound II wherein R 3 ' is a protected aldehyde group with sodium azide, (b) treating the product with an aqueous chromium chloride solution and (c) releasing the aldehyde-protective group.
• Step (a) can be performed in an organic solvent such as dimethylformamide, acetone, acetonitrile, or tetrahydrofuran under heating.
• Step (b) can be performed in an organic solvent such as acetone, acetonitrile, tetrahydrofuran, or methanol under cooling, preferably in an argon gas atmosphere.
• a compound I-j wherein R 5 " is a hydrogen atom or a lower alkyl group, and R 7 ' is a lower alkyl group, an aryl group, or an aralkyl group can be prepared by (a) reacting a compound XVI with a compound XVII and (b) releasing the aldehyde-protective group.
• Compounds X VI and XVII can be reacted in an aqueous organic solvent such as aqueous methanol, ethanol, acetone, or tetrahydrofuran at room temperature.
• an aqueous organic solvent such as aqueous methanol, ethanol, acetone, or tetrahydrofuran at room temperature.
• a compound I-k can be prepared by (a) reacting a compound XVI wherein R 5 " is a hydrogen atom with a compound XVIII or a reactive derivative thereof and (b) releasing the aldehyde-protective group.
• an acid halide or acid anhydride can be used as a reactive derivative of compound XVIII.
• Step (a) can be performed under the same reaction conditions as in step (a) of method 10.
• a compound 1-l can be prepared by (a) reacting a compound XVI with a compound XIX and (b) releasing the aldehyde-protective group.
• Compounds XVI and XIX can be reacted in an organic solvent such as benzene or dimethylformamide under heating, preferably in the presence of a base such as triethylamine or pyridine.
• a compound I-m can be performed by (a) reacting a compound XVI wherein R 5 " is a hydrogen atom with a lower alkyl halide and (b) releasing the aldehyde-protective group.
• Suitable lower alkyl halides include methyl iodide, ethyl iodide, t-butyl bromide.
• the reaction can be performed in an organic solvent such as acetonitrile, acetone or dimethylformamide, under heating.
• MIC antimicrobial activities
• the compounds of this invention can be administered orally or parenterally as tablets, capsules, powders, injections, or liquids prepared using conventional carriers.
• the doses of the medicaments may be-10-1000 mg per single dose 1 to 4 times a day.
• NMR means a nuclear magnetic resonance spectrum
• Anal. an elemental analytical value
• IR an infrared absortion spectrum
• UV an ultraviolet absorption spectrum
• Mass a mass spectrum
• m.p. a melting point
• R f a rate of flow
• Me.a methyl group the quoted chromatography eluant ratios are by volume.
• the reaction mixture was concentrated under reduced pressure to remove acetonitrile and after adding thereto chloroform, the mixture was concentrated again.
• the residue was dissolved in 8 ml of chloroform and the solution was washed once with 2 ml of a saturated aqueous sodium hydrogen carbonate solution and then twice each time with 2 ml of a saturated aqueous sodium sulfate solution, and then concentrated under reduced pressure.
• reaction was performed for one day at 80°C.
• the reaction mixture was concentrated under reduced pressure to distill off acetonitrile, and after adding chloroform to the residue, the mixture was concentrated under reduced pressure.
• the residue was dissolved in 10 ml of chloroform, and the solution was washed once with 2 ml of saturated aqueous sodium hydrogencarbonate solution and then twice each time with 2 ml of saturated aqueous sodium sulfate solution, dried over anhydrous sodium sulfate and concentrated under reduced pressure.
• the residue was azeotroped three times with toluene and charged, to a column filled with 20 g of silica gel and a mixture of chloroform and methanol (50:1),using said mixture. Chromatography was performed using a mixture of chloroform and methanol (6:1) to provide 160.5 mg (yield 80%) of the crude product.
• the residue thus formed was dissolved in 2.8 ml of methanol and the solution was heated at 50 C for 6 hours. Then, the solvent was distilled off, the residue thus obtained was dissolved in chloroform and the solution was washed with a saturated aqueous sodium hydrogencarbonate solution and then a saturated aqueous sodium sulfate solution, and after drying the solution with anhydrous sodium sulfate, the solvent was distilled off.
• the residue was dissolved in 1.1 ml of acetonitrile and after adding thereto 2.5 ml of hydrochloric acid, the mixture was allowed to stand for 60 minutes at room temperature. To the reaction system was added 28 mg of sodium hydrogencarbonate to stop the reaction and then the product was extracted thrice each time with chloroform. The chloroform layers were combined with each other and the mixture was washed with a saturated aqueous sodium sulfate solution and dried with anhydrous sodium sulfate.
• reaction product (-10.1 g) was dissolved in 300 ml of acetonitrile containing 10.5 g of diethylamine and the solution was heated at 70-80°C for 3 hours in a closed tube. was heated at for 3 hours a closed After cooling, acetonitrile was distilled off under reduced pressure and the residue thus formed was dissolved in 300 ml of chloroform. The solution was washed with water, dried with anhydrous magnesium sulfate, and then chloroform was distilled off.
• the red-brown residue thus obtained was purified by column chromatography using 800 ml of silica gel and an eluant consisting of chloroform and methanol (10 : 1) to provide 4.4 g of 23-deoxy-23-ethylamino-2',4'-0-acetylmycaminosyl tylonolide diethylacetal as a lemmon yellow caramel.
• This product (600 mg) was dissolved in 12 ml of acetonitrile and after adding thereto 79.5 ⁇ liter of acetic anhydride at room temperature, the mixture was allowed to stand for one hour at room temperature. After distilling off acetonitrile under reduced pressure, 10 ml of a saturated aqueous sodium hydrogencarbonate solution was added to the residue and the product was extracted with 50 ml of chloroform.
• chloroform extract was washed with water and after drying with anhydrous magnesium sulfate, chloroform was distilled off to provide crude 23-N-acetylethylamino-23-deoxy-2',4'-di-0-acetylmycamino- syl tylonolide diethylacetal.
• the foregoing product was dissolved in 30 ml of methanol and after maintaining the solution at 50-55°C for 6 hours, methanol was distilled off under reduced pressure. To the residue were added 10 ml of . saturated aqueous sodium hydrogencarbonate and 30 ml of chloroform followed by shaking well; the chloroform layer was recovered. The aqueous layer thus formed was extracted with 20 ml of chloroform and the chloroform layer was combined with the foregoing chloroform layer. The resultant chloroform solution was washed with water, dried with anhydrous magnesium sulfate, and.then chloroform was distilled off under reduced pressure to provide a yellowish caramel.
• the caramel was purified by column chromatography using 70 ml of silica gel and an eluant comprising chloroform, methanol, and concentrated aqueous ammonia (15 : 1 : 0.1) to provide 260 mg of 23-N-acetylethylamino-23-deoxymycaminosyl tylonolide.
• the chloroform solution was washed with 20 ml of a saturated aqueous sodium hydrogencarbonate solution and then 20 ml of water, dried with anhydrous sodium sulfate, and then chloroform was distilled off under reduced pressure.
• the residue thus obtained was dissolved in a mixture of 25 ml of 0.1N-hydrochloric acid and 13 ml of acetonitrile and the solution was allowed to stand for 2 hours at room temperature.
• the solution was alkalified by sodium hydrogencarbonate and extracted with 30 ml, 20 ml, and then 10 ml of chloroform.
• the extracts were washed with water, dried with anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure.
• the residue was purified by column chromatography using 70 ml of silica gel and an eluant comrising chloroform, methanol, and concentrated aqueous ammonia(15 : 1 : 0.1) to provide 278 mg of yellowish amorphous powder of 23-deoxy-23-N-ethylpropionylaminomycaminosyl tylonolide.
• Example 41 By following the same procedure as in Example 42 using 600 mg of 23-deoxy-23-ethylamino-2',4'-di-O-acetylmycaminosyl tylonolide diethylacetal obtained in Example 41 as an intermediate and 110.1 mg of furoic acid chloride, 397 mg of yellowish amorphous powder of 23-deoxy-23-N-(2-furoyl)ethylaminomyca- minosyl tylonolide was obtained.
• the residue was dissolved in a mixture of 25 ml of 0.1N-hydrochloric acid and 13 ml of acetonitrile and the solution was allowed to stand for 2 hours at room temperature. Then, the solution was alkalified with sodium hydrogencarbonate and extracted with 30 ml, 20 ml, and 10 ml' of chloroform. The extracts were combined with each other, washed with. water, dried with anhydrous magnesium sulfate, and chloroform was distilled off at reduced pressure.
• the benzene layer thus formed was recovered, washed with water, dried with anhydrous sodium sulfate, and benzene was distilled off under reduced pressure to provide crude 23,4'-dideoxy-23-iodo-2'-0-acetylmycaminosyl tylonolide diethylacetal.
• the product was dissolved in 75 ml of acetonitrile and after adding thereto 75 ml of a. 2M.ethylamine acetonitrile solution, the mixture was heated for 2 hrs. at 70-80°C in a closed tube. After cooling the reaction mixture, acetonitrile was distilled off under reduced pressure and the residue was dissolved in 200 ml of chloroform.
• the solution thus obtained was washed with water, dried by anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure.
• the brownish residue thus obtained was purified by column chromatography using 300 ml silica gel and an eluant consisting of chloroform and methanol (20 : 1) and then an eluant consisting of chloroform and methanol ( 10 : 1) to provide 2.8 g of a lemmon yellow amorphous powder of 23,4'-dideoxy-23-ethylamino-2'-0-acetylmycaminosyl tylonolide diethylacetal.
• the chloroform layer thus formed was recovered, washed with water, dried, and then chloroform was distilled off under reduced pressure to provide crude 23,4'-dideoxy-23-N-(2-furoyl)ethyl- amino-2'-0-acetylmycaminosyl tylonolide diethylacetal.
• the product was dissolved in 20 ml of methanol and after allowing the solution to stand for 7 hours at 50-60°C, methanol was distilled off under reduced pressure.
• the product was dissolved in a mixture of 13 ml of 0.1N hydrochloric acid and 7 ml of acetonitrile and the solution was allowed to stand for 2 hours at room temperature.
• the reaction product was alkalified with sodium hydrogencarbonate and extracted with 30 ml, 20 ml, and then 10 ml of chloroform.
• the chloroform extracts were combined with each other, washed with water, dried by anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure.
• the product was dissolved in 20 ml of methanol and after allowing the mixture to stand for 7 hours at 50-5 5 ° C ,methanol was distilled off under reduced pressure.
• the residue was dissolved in 40 ml of chloroform and the solution was washed with 20 ml of a saturated sodium hydrogencarbonate solution and then 10 ml of water, dried by anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure to provide crude 23,4'- dideoxy-23-N-nicotinoylethylaminomycaminosyl tylonolide diethylacetal.
• the product was dissolved in a mixture of 13 ml of O.lN aqueous hydrochloric acid and 7 ml of acetonitrile and the solution was allowed to stand for 2 hours at room temperature.
• the solution was alkalified with sodium hydrogen-- carbonate and extracted with 20 ml, 10 ml, and then 10 ml of chloroform.
• the extracts were combined with each other, washed with water, dried with anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure.
• the residue was purified by column chromatography using 40 ml of silica gel and an eluant consisting of chloroform, methanol, and concentrated aqueous ammonia (15 : 1 : 0.1) to provide 162 mg of yellowish non-scrystalline powder of 23,4'-dideoxy-23-N-nicotinoylethylaminomycaminosyl tylonolide.
• the . residue was dissolved in 200 ml of chloroform, the solution was washed with a saturated aqueous sodium hydrogencarbonate solution, water, and then saturated aqueous sodium chloride and dried with anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure to provide crude 23-N-acetylethylamino-23,4'-dideoxy-2'-0-acetylmycaminosyl tylonolide.
• the product was dissolved in 90 ml of methanol and the solution was heated at 50-60°C for 7 hours.
• the crude product was dissolved in a mixture of 46 ml of 0.1N HC1 and 30 ml of acetonitrile and the solution was allowed to stand for 3 hours at room temperature.
• the solution was alkalified with sodium hydrogencarbonate, extracted with 100 ml, 30 ml, and then 20 ml of chloroform, the extracts were combined with each other, washed with water, and dried with anhydrous magnesium sulfate,and then chloroform was distilled off under reduced pressure to provide a crude product of the desired compound.
• the product was purified by column chromatography using 200 ml of silica gel and an eluant consisting of chloroform, methanol, and concentrated aqueous ammonia (18 : 1 : 0.1) to provide 980 mg of23-N-acetylethylamino-23,4'-dideoxymycaminosyl tylonolide.
• Example 48 b By following the same procedure as in Example 48 b) using 400 mg of 23-0-chloroacetyl-2',4'-di-0-acetylmycaminosyl tylonolide diethylacetal and 97 mg of hexamethyleneimine, 96.9 mg of yellowish amorphous powder of 23-0-hexamethyleneimino- acetylmycaminosyl tylonolide was obtained.
• the residue was dissolved in a mixture of 7 ml of acetonitrile and 14 ml of O.lN hydrochloric acid and the solution was allowed to stand for 22 hours at room temperature, alkalified by the addition of sodium hydrogencarbonate, and extracted thrice each time with 20 ml of chloroform.
• the extract was washed with 20 ml of water and then 20 ml of a saturated aqueous sodium chloride solution, dried by anhydrous magnesium sulfate, and then chloroform was distilled off under reduced pressure to provide a black-brown caramel.
• the product was purified by column chromatography using 50.ml of silica gel and eluant consisting of chloroform, methanol, and concentrated aqueous ammonia (15 : 1 : 0.1) to provide a yellowish amorphous powder of 23-0-(pyridine-2-thioyl)-acetylmycaminosyl tylonolide.
• the black-brown oil thus obtained was purified by column chromatography using 300 ml of silica gel and an eluant consisting of benzene and acetone (2 : 1) to provide 1.56 g of a yellow-brown amorphous powder of 23-0-chloroacetyl-2'-0- acetyl-4'-deoxymycaminosyl tylonolide diethylacetal.
• chloroform was distilled off under reduced pressure and the residue was purified by column chromatography using 150 ml of silica gel and an eluant consisting of chloroform, methanol, and concentrated aqueous ammonia (15 : 1 : 0.1) to provide 620 mg of yellowish amorphous powder of 23-0-dimethylaminoacetyl-4'-deoxymycaminosyl tylonolide.
• the residue was dissolved in 36 ml of methanol and after allowing the solution to stand for 20 hours at room temperature, methanol was distilled off under reduced pressure.
• the residue was dissolved in a mixture of 30 ml of 0.1N hydrochloric acid and 15 ml of acetonitrile, the solution was allowed to stand for 2 hours at room temperature, alkalified by the addition of sodium hydrogencarbonate, and extracted thrice each time with 20 ml of chloroform.
• the extracts were combined with each other, washed with 20 ml of water and then 20 ml of a saturated aqueous sodium chloride solution and dried by anhydrous magnesium sulfate.
• Chloroform was distilled off under reduced pressure and the residue was purified by column chromatography using 150 ml of silica gel and an eluant consisting of chloroform, methanol, and concentrated aqueous ammonia (14 : 1 : 0.1) to provide 220 mg of yellowish amorphous powder of 23-0-pyrrolidino- acetyl-4'-deoxymycaminosyl tylonolide.
• Example 50 By the procedure of Example 50 using 1 g of 23-0-chloro acetyl-2'-0-acetyl-4'-deoxymycaminosyl tylonolide diethylacetal obtained in Example 51 as an intermediate and 174 mg of 2-mercaptopyridine, 311.8 mg of a lemmon yellow amorphous powder of 23-0-(pyridine-2-thioyl)acetyl-4'-deoxymycaminosyl tylonolide was obtained.
• the residue was dissolved in chloroform, the insoluble matters were filtered off, the chloroform layer was washed once with a saturated aqueous sodium hydrogencarbonate solution, a 0.1M aqueous sodium thiosulfate solution, and then a saturated aqueous sodium sulfate solution, and dried by anhydrous sodium sulfate, and then the solvent was distilled off.
• the residue was purified by silica gel column chromatography using a solvent system of chloroform and methanol to provide 94.4 mg (yield 89%) of 19-decarbonyl-22,4'-dideoxy-22-iodomycaminosyl tylonolide. (Recrystallized from acetone-n-hexane).
• the product was dissolved in 25 ml of ethyl acetate and the solution was filtered by glass wool filter. The filtrate was washed with 8 ml of a saturated aqueous sodium hydrogencarbonate solution, a O.lM aqueous sodium thiosulate solution, and then a saturated aqueous sodium sulfate solution and then the ethyl acetate layer was dried with anhydrous sodium sulfate and concentrated under reduced pressure.
• the reaction mixture was neutralized by the addition of 62.1 mg of sodium hydrogencarbonate and 0.8 ml of a saturated aqueous sodium hydrogencarbonate solution and then extracted thrice each time with 2 ml of chloroform.
• the chloroform layers were combined with each other, washed twice each time with 2 ml of a saturated aqueous sodium sulfate solution, dried with anhydrous sodium sulfate, and concentrated under reduced pressure.
• the former was obtained by filtering hot after the addition of acetone and recrystallizing from n-hexane and the latter was obtained by reprecipitating from acetone-n-hexane. (Yield: 76.7% for both products)
• the solvent was distilled off and the residue thus obtained was subjected to chromatographic treatment on 50 g of a silica gel column using a solvent system of chloroform-methanol-28% aqueous ammonia (15 : 1 : 0.1) to provide 820 mg of 12,13-epoxymycaminosyl tylonolide diethylacetal.
• the solvent was distilled off, the residue thus obtained was dissolved in a small amount of methanol, a large amount of water was added to the solution and the precipitates were filtered away. The filtrate was concentrated and the residue formed was dissolved in water.
• the solution was washed with toluene and after adding 0.1 M sodium carbonate to the aqueous layer, the mixture was extracted thrice each time with chloroform.
• the chloroform layers were combined with each other, washed with a saturated aqueous sodium sulfate solution, and dried by anhydrous sodium sulfate.
• the solvent was distilled off and the residue thus formed was chromatographically treated on a column of 50 g of silica gel using a solvent system of chloroform-methanol-28% aqueous ammonia (15 : 1 : 0.1) to provide 225 mg of 23-deoxy-23-dimethylamino-12,13-epoxymycaminosyl tylonolide diethylacetal.
• the product was dissolved in 2 ml of acetonitrile and after adding thereto 9.5 ml of O.lN hydrochloric acid, the mixture was allowed to stand for 60 minutes. To the reaction mixture was added 0.1M sodium carbonate to form white turbidity (pH 9).and the product was extracted thrice each time with chloroform.
• the chloroform layers were combined with each other, washed with a saturated aqueous sodium sulfate solution, and then dried with anhydrous sodium sulfate.
• the solvent vas distilled off and the residue thus obtained was chromatographically treated on a column of 20 g of silica gel using a solvent system of chloroform-methanol-28% aqueous ammonia (10 : 1 : 0.1) to provide 185 mg (yield 11%) of 23-deoxy-23-dimethylamino-12,13-epoxymycaminosyl tylonolide.
• the reaction mixture was concentrated under reduced pressure and the residue was extracted with 5 ml of chloroform.
• the extract was washed thrice each time with 2 ml of a saturated aqueous sodium hydrogencarbonate solution, and then twice each time with 2 ml of a saturated aqueous sodium sulfate solution, dried with anhydrous sodium sulfate, and concentrated under reduced pressure.
• the reaction mixture was concentrated under reduced pressure and the residue was extracted with 5 ml of chloroform.
• the extract was washed twice each time with 2 ml of a saturated aqueous sodium hydrogencarbonate solution and then 2 ml of a saturated aqueous sodium sulfate solution, dried by anhydrous sodium sulfate, and concentrated under reduced pressure.
• the residue was subjected to column chromatography using chloroform-methanol-28% aqueous ammonia (30 : 1 : 0.1) to provide 88.7 mg (yield 76%) of the reaction product.
• the extract was washed twice each time with 3 ml of saturated aqueous sodium hydrogencarbonate and then once with 3 ml of an saturated aqueous sodium sulfate solution, dried by anhydrous sodium sulfate, and then concentrated under reduced pressure.
• the residue was subjected to silica gel column chromatography using chloroform-methanol-28% aqueous ammonia (15 : 1 : 0.1).
• the reaction product thus obtained was dissolved in 0.74 ml of acetonitrile and after adding thereto 2.8 ml of 0.1N hydrochloric acid, the mixture was allowed to stand for one hour at room temperature.
• To the reaction mixture was added 2 ml of a saturated aqueous sodium hydrogencarbonate solution and the product was extracted with 3 ml of chloroform.
• the extract was washed with a saturated aqueous sodium sulfate solution, dried by anhydrous sodium sulfate, and then concentrated under reduced pressure.
• the residue was recrystallized from acetone-n-hexane to provide 600 mg of 23-deoxy-23-N-(2,2,2-trifluoroethyl)ethyl- aminomycaminosyl tylonolide.
• the product thus obtained was dissolved in 1 ml of acetonitrile and after adding thereto 2.9 ml of O.lN hydrochloric . acid, the mixture was allowed to stand for one hour at room temperature. To the reaction mixture was added 2 ml of a saturated aqueous sodium hydrogencarbonate solution and the product was extracted with 3 ml of chloroform. The extract was washed with a saturated aqueous sodium sulfate solution, dried by anhdrous sodium sulfate, and concentrated under reduced pressure.

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• 1982
  • 1982-07-01 AU AU85524/82A patent/AU551142B2/en not_active Ceased
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  • 1982-07-08 ES ES513827A patent/ES513827A0/es active Granted
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